We ALL need to confirm our voter registration. In fact, if you've done so already, check again since unlawful purging of names from the rolls is ongoing in many states.
Even in states where registration deadlines have expired, it's still possible that some county clerks will allow you to show identification to them before November 4 so you can vote on a regular vs. provisional ballot.
You really don't want to use a provisional ballot if you have a choice. Large numbers of provisional ballots will be thrown away. (Note that some states allow provisional voters to take further steps for a limited time after the election so their vote can be counted.) Analysis of the 2004 election showed that a third of all provisional ballots - as many as 1 million votes - were uncounted, with similar results in 2006.
